Fire-proof shutter or door



(N0M0de1.)- I 0. ST. JOHN;

FIRE PROOF SHUTTER 0R DQOR. N0. 438.65% Patented Oct. 21, 1890.

UNITED STATES PATENT OFFICE.

CARLISLE ST. JOHN, OF DES MOINES, IOWVA.

FIRE-PROOF SHUTTER OR DOOR.

SPECIFICATION forming part of Letters Patent No. 438,652, dated October21, 1890. Application filed March 14,1890. Serial No.343,945. (Nomodel.)

To aZZ whom it'may concern.-

Be it known that I, CARLISLE ST. JOHN, a citizen of the United States,residing at Des Moines, in the county of Polk, in the State of Iowa,have invented a new and useful Fire- Proof Shutter or Door, of which thefollowing is a specification.

My object is to provide a cheap, durable, and light metal shutter ordoor, which maybe constructed. by the joining together of corrugatedsheet iron or metal plates, as hereinafter set forth.

In carrying out my invention I shape and. combine two sheets or piecesof corrugated metal of uniform size and shape, the corrugations of themetal sheets being at intervals or points on the sheets, so that meetingplanes or faces are provided between them. The two parts are placedtogether so that the meeting faces register and are in contact with eachother, when rivets or other suitable means, are employed to secure thetwo sections of metal together, forming a window-blind or door, asdesired. I a1so provide means by which the side edges of the sectionsoverlap so as to form a tight joint when the shutters are closed, andalso to strengthen the connection between said sections, and also ametallic strip conforming to the shape of the upper edge of the shutter,which is secured transversely thereto on the outer side thereof, so asto project upwardly beyond said shutter, and a re-enforcing-strip on theinner side.

Myinvention consists, further, in details of construction hereinafterdescribed, reference being had to the accompanying drawings, in which-Figure 1 is a view showing my improved window-shutters in position forpractical use, one of said shutters being closed, showing the outsideface, and the other opened to show the inside face, of the shutter. Fig.2 is a sectional view of the shutter on the line 00 0c of Fig. 1. Fig. 3is an enlarged detail sectional view showing forms of corrugationsdiffering from those shown in Figs. 1 and 2.

A and B are window-shutters hung at a b to the outer sides of the wallsby means of hooks formed on the outer ends of bars 0, said hooksentering eyes 0 in the walls in the usual manner.

The sections D and E of corrugated metal,

the corrugations of which may be of any de sired form, as shown in Fig.2, oblong, or, as in Fig. 3, oblong, oval, and diamond-shaped, are thenbrought together, the plane faces between the corrugations registeringand in contact with each other, and secured together by rivets or othersuitable means, thus forming continuous open-ended spaces longitudinallyof the shutters, permitting free circulation of the air. Each of saidsections-Dand E, Fig. 3, are so formed at each of their sides as thatfinished edges are provided at one side by bending the edge of section Eabout the edge of section D, and at the other by bending the edge ofsection D about the edge of section E, and securing the edges of saidsections together by rivets (I. By reason of this construction, Fig. 2,when the blinds are closed, the finished edges of two mating shuttersoverlap and the beveled faces of the cor.- rugations are in a positionclose to one another, and thus when the shutters are looked a joint isformed which it would be difficult to pry open either from the inner orthe outer side of the windows.

H H are rods which hold the shutters in an open position. j

J are flat metal plates conforming in shape with the top ends of theshutters and riveted thereto on the outside to project upward, and tooverlap the window-casing, as required, to restrict the inward motionsof the shutters and to produce close joints at the top of the window.

J are plates on the inside, and their top edges are even with the topedges of the corrugated plates D and E.

I am aware that heretofore metallic shutters have been formed ofsections which were corrugated to produce open-ended air-spaces, saidmating sections having been fastened to a frame; but

WVhat I claim as myinvention is- 1. In the construction of a fire-proofshutter or door, the combination of two corrugated metal plates thathave mating and overlapping sections that extend their entire lengths,

in the manner set forth, and rigidly connectedby means of rivets fixedin the said overlapping plane surfacesat intervals, as shown anddescribed.

2. In the construction of a fire-proof shutt-er or door, the combinationof two metallic upper edge of the shutter, and an inner re-ensections,each having eorrugations with matforcing-strip, as and for the purposesset forth. ing faces between them, said sections being joined by rivetsthrough the mating faces, CARLISLE ST. J OIIN. 5 and their side edgesbeing extended and over- \Vitnesses:

lapped, an outer strip at the upper edge of the O. "W. STILES,

shutter extending upwardly above the said THOMAS G. OVING.

